/usr/share/k3d/lsystem/fern-plant.ls is in k3d-data 0.8.0.3-3build1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | # --- L-System Parser/Mutator --- Lj Lapre ----------------------------------
#
20 # recursion
20 # angle
15 # thickness
#
#---------------------------------------- axioms
#
#c(12)&(60)C # use this as axiom to test a leave
#c(12)b # use this as axiom to test a branch
c(12)b>(60)b>(60)b>(60)b>(60)b>(60)b # the whole thing
#
# ---------------------------------------- rules
#
b=[&(30)A]
#
A=~(7)$t(.1)F[+(40)C][-(40)C]!(.95)~(7)t(.1)FA
#
C=~(10)$tF[+(60)L][-(60)L]C
#
L=[~(15)c(4){-f+f+f-|-f+f}]
#
F='(1.3)F'(.77)
f='(1.3)f'(.77)
#
#~=_ # uncomment to remove random efx
@
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